{"ast":null,"code":"/**\n * @fileoverview This module has some functions for handling a plain object, json.\n * @author NHN.\n *         FE Development Lab <dl_javascript@nhn.com>\n */\n'use strict';\n\nvar type = require('./type');\n\nvar array = require('./array');\n/**\n * The last id of stamp\n * @type {number}\n * @private\n */\n\n\nvar lastId = 0;\n/**\n * Extend the target object from other objects.\n * @param {object} target - Object that will be extended\n * @param {...object} objects - Objects as sources\n * @returns {object} Extended object\n * @memberof tui.util\n */\n\nfunction extend(target, objects) {\n  // eslint-disable-line no-unused-vars\n  var hasOwnProp = Object.prototype.hasOwnProperty;\n  var source, prop, i, len;\n\n  for (i = 1, len = arguments.length; i < len; i += 1) {\n    source = arguments[i];\n\n    for (prop in source) {\n      if (hasOwnProp.call(source, prop)) {\n        target[prop] = source[prop];\n      }\n    }\n  }\n\n  return target;\n}\n/**\n * Assign a unique id to an object\n * @param {object} obj - Object that will be assigned id.\n * @returns {number} Stamped id\n * @memberof tui.util\n */\n\n\nfunction stamp(obj) {\n  if (!obj.__fe_id) {\n    lastId += 1;\n    obj.__fe_id = lastId; // eslint-disable-line camelcase\n  }\n\n  return obj.__fe_id;\n}\n/**\n * Verify whether an object has a stamped id or not.\n * @param {object} obj - adjusted object\n * @returns {boolean}\n * @memberof tui.util\n */\n\n\nfunction hasStamp(obj) {\n  return type.isExisty(pick(obj, '__fe_id'));\n}\n/**\n * Reset the last id of stamp\n * @private\n */\n\n\nfunction resetLastId() {\n  lastId = 0;\n}\n/**\n * Return a key-list(array) of a given object\n * @param {object} obj - Object from which a key-list will be extracted\n * @returns {Array} A key-list(array)\n * @memberof tui.util\n */\n\n\nfunction keys(obj) {\n  var keyArray = [];\n  var key;\n\n  for (key in obj) {\n    if (obj.hasOwnProperty(key)) {\n      keyArray.push(key);\n    }\n  }\n\n  return keyArray;\n}\n/**\n * Return the equality for multiple objects(jsonObjects).<br>\n *  See {@link http://stackoverflow.com/questions/1068834/object-comparison-in-javascript}\n * @param {...object} object - Multiple objects for comparing.\n * @returns {boolean} Equality\n * @memberof tui.util\n * @example\n * //-- #1. Get Module --//\n * var util = require('tui-code-snippet'); // node, commonjs\n * var util = tui.util; // distribution file\n *\n * //-- #2. Use property --//\n * var jsonObj1 = {name:'milk', price: 1000};\n * var jsonObj2 = {name:'milk', price: 1000};\n * var jsonObj3 = {name:'milk', price: 1000};\n * util.compareJSON(jsonObj1, jsonObj2, jsonObj3);   // true\n *\n * var jsonObj4 = {name:'milk', price: 1000};\n * var jsonObj5 = {name:'beer', price: 3000};\n * util.compareJSON(jsonObj4, jsonObj5); // false\n */\n\n\nfunction compareJSON(object) {\n  var argsLen = arguments.length;\n  var i = 1;\n\n  if (argsLen < 1) {\n    return true;\n  }\n\n  for (; i < argsLen; i += 1) {\n    if (!isSameObject(object, arguments[i])) {\n      return false;\n    }\n  }\n\n  return true;\n}\n/**\n * @param {*} x - object to compare\n * @param {*} y - object to compare\n * @returns {boolean} - whether object x and y is same or not\n * @private\n */\n\n\nfunction isSameObject(x, y) {\n  // eslint-disable-line complexity\n  var leftChain = [];\n  var rightChain = [];\n  var p; // remember that NaN === NaN returns false\n  // and isNaN(undefined) returns true\n\n  if (isNaN(x) && isNaN(y) && type.isNumber(x) && type.isNumber(y)) {\n    return true;\n  } // Compare primitives and functions.\n  // Check if both arguments link to the same object.\n  // Especially useful on step when comparing prototypes\n\n\n  if (x === y) {\n    return true;\n  } // Works in case when functions are created in constructor.\n  // Comparing dates is a common scenario. 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Get Module --//\n * var util = require('tui-code-snippet'); // node, commonjs\n * var util = tui.util; // distribution file\n *\n * //-- #2. Use property --//\n * var obj = {\n *     'key1': 1,\n *     'nested' : {\n *         'key1': 11,\n *         'nested': {\n *             'key1': 21\n *         }\n *     }\n * };\n * util.pick(obj, 'nested', 'nested', 'key1'); // 21\n * util.pick(obj, 'nested', 'nested', 'key2'); // undefined\n *\n * var arr = ['a', 'b', 'c'];\n * util.pick(arr, 1); // 'b'\n */\n\n\nfunction pick(obj, paths) {\n  // eslint-disable-line no-unused-vars\n  var args = arguments;\n  var target = args[0];\n  var i = 1;\n  var length = args.length;\n\n  for (; i < length; i += 1) {\n    if (type.isUndefined(target) || type.isNull(target)) {\n      return;\n    }\n\n    target = target[args[i]];\n  }\n\n  return target; // eslint-disable-line consistent-return\n}\n\nmodule.exports = {\n  extend: extend,\n  stamp: stamp,\n  hasStamp: hasStamp,\n  resetLastId: resetLastId,\n  keys: Object.prototype.keys || keys,\n  compareJSON: compareJSON,\n  pick: 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Another built-ins?\n    // We can even handle functions passed across iframes\n    if ((type.isFunction(x) && type.isFunction(y)) ||\n        (x instanceof Date && y instanceof Date) ||\n        (x instanceof RegExp && y instanceof RegExp) ||\n        (x instanceof String && y instanceof String) ||\n        (x instanceof Number && y instanceof Number)) {\n        return x.toString() === y.toString();\n    }\n\n    // At last checking prototypes as good a we can\n    if (!(x instanceof Object && y instanceof Object)) {\n        return false;\n    }\n\n    if (x.isPrototypeOf(y) ||\n        y.isPrototypeOf(x) ||\n        x.constructor !== y.constructor ||\n        x.prototype !== y.prototype) {\n        return false;\n    }\n\n    // check for infinitive linking loops\n    if (array.inArray(x, leftChain) > -1 ||\n        array.inArray(y, rightChain) > -1) {\n        return false;\n    }\n\n    // Quick checking of one object beeing a subset of another.\n    for (p in y) {\n        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {\n            return false;\n        } else if (typeof y[p] !== typeof x[p]) {\n            return false;\n        }\n    }\n\n    // This for loop executes comparing with hasOwnProperty() and typeof for each property in 'x' object,\n    // and verifying equality for x[property] and y[property].\n    for (p in x) {\n        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {\n            return false;\n        } else if (typeof y[p] !== typeof x[p]) {\n            return false;\n        }\n\n        if (typeof (x[p]) === 'object' || typeof (x[p]) === 'function') {\n            leftChain.push(x);\n            rightChain.push(y);\n\n            if (!isSameObject(x[p], y[p])) {\n                return false;\n            }\n\n            leftChain.pop();\n            rightChain.pop();\n        } else if (x[p] !== y[p]) {\n            return false;\n        }\n    }\n\n    return true;\n}\n/* eslint-enable complexity */\n\n/**\n * Retrieve a nested item from the given object/array\n * @param {object|Array} obj - Object for retrieving\n * @param {...string|number} paths - Paths of property\n * @returns {*} Value\n * @memberof tui.util\n * @example\n * //-- #1. Get Module --//\n * var util = require('tui-code-snippet'); // node, commonjs\n * var util = tui.util; // distribution file\n *\n * //-- #2. Use property --//\n * var obj = {\n *     'key1': 1,\n *     'nested' : {\n *         'key1': 11,\n *         'nested': {\n *             'key1': 21\n *         }\n *     }\n * };\n * util.pick(obj, 'nested', 'nested', 'key1'); // 21\n * util.pick(obj, 'nested', 'nested', 'key2'); // undefined\n *\n * var arr = ['a', 'b', 'c'];\n * util.pick(arr, 1); // 'b'\n */\nfunction pick(obj, paths) { // eslint-disable-line no-unused-vars\n    var args = arguments;\n    var target = args[0];\n    var i = 1;\n    var length = args.length;\n\n    for (; i < length; i += 1) {\n        if (type.isUndefined(target) ||\n            type.isNull(target)) {\n            return;\n        }\n\n        target = target[args[i]];\n    }\n\n    return target; // eslint-disable-line consistent-return\n}\n\nmodule.exports = {\n    extend: extend,\n    stamp: stamp,\n    hasStamp: hasStamp,\n    resetLastId: resetLastId,\n    keys: Object.prototype.keys || keys,\n    compareJSON: compareJSON,\n    pick: pick\n};\n"]},"metadata":{},"sourceType":"script"}